Resort site (5)
'resort site' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shore that I've seen before include "Beach; prop (up)" , "Prop; coastline" , "Sailors might, given such leave" , "coastal area" , "Land by sea's edge" .)
(Other definitions for seaside that I've seen before include "Coastal area" , "Coastal region" , "Disease (anag) -- coast" , "Popular resort area" , "Old song 'I do like to be beside the . . . . . . .'" .)